208 



COMMON SEAL. 



easily distinguished by the form and arrangement 

 of its teeth. 



In the Common Seal there are seven cervical, 

 fifteen dorsal, five lumbar, three sacral, and eight 

 cervical vertebrae. On the fore foot the first toe is 

 longest, the second scarcely shorter, the rest gra- 

 duated. The first toe of the hind foot is also long- 

 est, the second next, the fifth or outer next, then the 

 fourth, the third shortest. 



